feat: add aws Lambda instrumentation

[xuan-cao-swi]

This instrumentation allow user to use the handler to extract parent context from header that produce distributed tracing.

Inspired by splunk ruby lambda layer and opentelemetry python lambda layer.
Ruby layer creation can be found in opentelemetry-lambda PR

Sample wrapper should be added in layer creation (with lambda instrumentation).

# wrapper.rb
require 'opentelemetry/sdk'
require 'opentelemetry/exporter/otlp'
require 'opentelemetry/instrumentation/all'

OpenTelemetry::SDK.configure do |c|
  c.service_name = '<YOUR_SERVICE_NAME>'
  c.use_all() # enables all instrumentation!
end

def otel_wrapper(event:, context:)
  otel_wrapper = OpenTelemetry::Instrumentation::AwsLambda::Handler.new()
  otel_wrapper.call_wrapped(event: event, context: context)
end

To test with aws lambda, you can try to follow the steps here

[kaylareopelle]

@xuan-cao-swi - Are there any tests I should run using both your opentelemetry-lambda PR and this one?

[xuan-cao-swi]

@xuan-cao-swi - Are there any tests I should run using both your opentelemetry-lambda PR and this one?

I will create a detailed step to test lambda-related instrumentation.

[xuan-cao-swi]

@kaylareopelle I have created a gist for the steps; but let me know if it's uncleared or failed.

[kaylareopelle]

@xuan-cao-swi, thank you for the gist. It's very helpful! I've done a bit of testing, but wasn't able to successfully get the lambda to appear in New Relic. That might be an issue on our end. I'll also try to run some tests with an open-source endpoint. I plan to resume testing when I return to work on January 2, 2024.

[kaylareopelle]

This is looking great! I have a few, small documentation changes.

[kaylareopelle]

Xuan, Amazing job with this. Thank you for your hard work! 🚀

[cheempz]

LGTM, thanks @xuan-cao-swi (and @kaylareopelle + @arielvalentin for the continued guidance!). Really looking forward to when we can get the metrics component into upstream for the full Lambda tracing experience.

[kaylareopelle]

@xuan-cao-swi While reviewing #887, I noticed you made a few changes to release-please-related files. Do those changes need to be made for the lambda gem as well, or are releases different for this gem?

[xuan-cao-swi]

@xuan-cao-swi While reviewing #887, I noticed you made a few changes to release-please-related files. Do those changes need to be made for the lambda gem as well, or are releases different for this gem?

Yes, that would be great if can release together. I have updated the release files.

[arielvalentin]

This file was deleted on main. Please remove it from this branch.

[kaylareopelle]

It looks like we're getting close, @xuan-cao-swi! Is there anything else you were hoping to accomplish before we sync with main and merge this in?

[xuan-cao-swi]

It looks like we're getting close, @xuan-cao-swi! Is there anything else you were hoping to accomplish before we sync with main and merge this in?

Hi @kaylareopelle , no, I think it should be ok. I will open new PR if anything come up (esp. when incorporating with lambda layer build on lambda repo)